var timeout = 500;
var closetimer = 0;
var ddmenuitem = 0;
var ddhdr = 0;
function jsddm_open() {
	jsddm_canceltimer();
	jsddm_off();
	ddmenuitem = $(this).find('ul').css('display', 'block');
	ddhdr = $(this).find('a.nav_link').addClass('active');
}

function jsddm_off() {
	if(ddmenuitem) ddmenuitem.css('display', 'none');
	if(ddhdr) ddhdr.removeClass('active');
}

function jsddm_close() {
	if(ddmenuitem) ddmenuitem.css('display', 'none');
}

function jsddm_timer() {
	closetimer = window.setTimeout(jsddm_off, timeout);
}

function jsddm_canceltimer() {
	if(closetimer) {
		window.clearTimeout(closetimer);
		closetimer = null;
	}
}

$(document).ready(function() {
	$('#nav > li').bind('mouseover', jsddm_open)
	$('#nav > li').bind('mouseout', jsddm_timer)});
	
document.onclick = jsddm_close;